scientific article; zbMATH DE number 2154495
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Publication:4665020
zbMath1143.11311MaRDI QIDQ4665020
Publication date: 9 April 2005
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
General ternary and quaternary quadratic forms; forms of more than two variables (11E20) Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) (12D15)
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An elementary proof of Hilbert's theorem on ternary quartics ⋮ Hilbert’s theorem on positive ternary quartics: A refined analysis ⋮ A new approach to Hilbert's theorem on ternary quartics ⋮ Noncoercive sums of squares in \(\mathbb R[x_1,\ldots ,x_n\)]
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